#app {
  width: 600px;
  margin: 0 auto;
  position: relative;
}
#app .wrap {
  width: 602px;
  box-sizing: border-box;
  overflow: hidden;
}
#app .wrap ul li {
  float: left;
}
#app .wrap ul li img {
  width: 200px;
  height: 150px;
}
#app .seckill-wrap {
  position: relative;
  display: none;
}
#app .seckill-wrap .shade {
  width: 602px;
  height: 100%;
  background-color: #fff;
  position: fixed;
  top: 0;
  opacity: 0.5;
}
#app .seckill-wrap .seckill {
  width: 300px;
  height: 200px;
  position: fixed;
  top: 50px;
  left: 480px;
}
#app .seckill-wrap span {
  width: 30px;
  height: 20px;
  background-color: red;
  display: block;
  position: fixed;
  top: 50px;
  left: 750px;
  text-align: center;
  line-height: 20px;
  cursor: pointer;
}
